In the context of the preparation of (institutional) partnerships in Horizon Europe (HEU), it is essential to develop administrative / operational principles which ensure the full and unrestricted participation of private partners in such partnerships. Such principles should foster the continuation of the well-functioning ecosystems of industry, Research and Technology Organisations (RTOs), Small and Medium sized Enterprises (SME) and Universities. To contribute to the discussion on these operating principles, the signatory organisations share their views on four principles.